If you update the game yourself or downloaded it not here, you need download our new client.exe for playing UO 2D on TheAbyss. (Now you need Login.cfg again!) Setup is simple: copy files: client.exe and Login.cfg into already installed game UO 2D and run client.exe.
Use Login.cfg: uokr.theabyss.ru,7777.
The End setup.
But, if you want playing with Razor - see next, below.

3. Check for installed Microsoft .NET Framework (version 4.0 or later). You'll need to install dotnetfx.exe file if .NET Framework is absent in your system (http://www.microsoft.com/downloads/details.aspx?FamilyID=262d25e3-f589-4842-8157-034d1e7cf3a3&displaylang=en)
If you already have .NET Framework, the installer will notify you about it and you can continue with step 4.